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- 1. Multiple Choice
Which of the following bond(s) do(es) NOT exist in a secondary structure?
Peptide bond
Hydrogen bond
Disulphide bond
Ionic bond
- 2. Multiple Choice
The difference between tertiary and quartenary structure is:
Tertiary structure has double bond whereas quartenary structure does not have double bond
Tertiary structure consists of one polypeptide chain whereas quartenary structure consists of more than one polypeptide chains
Tertiary structure is fibrous whereas quartenary structure is globular
Tertiary structure is water-soluble whereas quartenary structure is lipid soluble
- 3. Multiple Choice
The repeating units of protein are
Amino acids
Glucose
Fatty acid
Peptides
- 4. Multiple Choice
The polypeptide in the diagram consists of;
3 amino acids and 3 peptide bonds
3 amino acids and 2 peptide bonds
4 amino acids and 2 phosphodiester bonds
3 amino acids and 2 phosphodiester bonds
- 5. Multiple Choice
The diagram shows the structure of collagen. Based on the diagram, what is the structural level of collagen?
Primary
Secondary
Tertiary
Quartenary
- 6. Multiple Choice
During the formation of the peptide bond which of the following takes place?
Hydroxyl group is lost from its carboxyl group of one amino acid and a hydrogen atom is lost from its amino group of another amino acid
Hydrogen atom is lost from its carboxyl group of one amino acid and a hydroxyl group is lost from its amino group of another amino acid
Hydroxyl group is lost from its carboxyl group of one amino acid and a hydroxyl group is lost from its amino group of another amino acid
Hydrogen atom is lost from its carboxyl group of one amino acid and a hydrogen atom is lost from its amino group of another amino acid
- 7. Multiple Choice
Tertiary structure is formed due to
interaction between the functional groups of different amino acids within a polypeptide chain
interaction between the side chain of different amino acids within a polypeptide chain
interaction between the functional groups of different amino acids between two polypeptide chains
interaction between the side chain of different amino acids between two polypeptide chains
- 8. Multiple Choice
Which of the following bond(s) can be found in a tertiary structure?
hydrogen bond
disulphide bridge
hydrophobic interaction
all of the above
- 9. Multiple Choice
Haemoglobin is a quartenary protein because;
It has more than one peptide bonds
Its shape is globular
It consists of more than one polypeptide chains
It has iron in each heme group
- 10. Multiple Choice
Based on the diagram, the side chain of amino acid alanine is;
NH2
COOH
H
CH3
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